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authorBreno Leitao <leitao@debian.org>2026-08-05 07:52:36 -0700
committerTejun Heo <tj@kernel.org>2026-08-10 11:47:20 -1000
commita5bde5d8fde8a8cb28e59a672d5ddc5b9c1e7656 (patch)
tree39f5b258386e1127d253d293194e9a2991bf3c34 /Documentation/subsystem-apis.rst
downloadlinux-stable-a5bde5d8fde8a8cb28e59a672d5ddc5b9c1e7656.tar.gz
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workqueue: skip the node_nr_active update for non-unbound workqueuesgrafted
apply_wqattrs_commit() updates node_nr_active->max unconditionally. wq->node_nr_active[] is only allocated for unbound workqueues, so guard the call before per-cpu workqueues start using this path. No functional change: only unbound workqueues reach apply_wqattrs_*() today. Signed-off-by: Breno Leitao <leitao@debian.org> Signed-off-by: Tejun Heo <tj@kernel.org>
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+.. SPDX-License-Identifier: GPL-2.0
+
+==============================
+Kernel subsystem documentation
+==============================
+
+These books get into the details of how specific kernel subsystems work
+from the point of view of a kernel developer. Much of the information here
+is taken directly from the kernel source, with supplemental material added
+as needed (or at least as we managed to add it — probably *not* all that is
+needed).
+
+Core subsystems
+---------------
+
+.. toctree::
+ :maxdepth: 1
+
+ core-api/index
+ driver-api/index
+ mm/index
+ power/index
+ scheduler/index
+ timers/index
+ locking/index
+
+Human interfaces
+----------------
+
+.. toctree::
+ :maxdepth: 1
+
+ input/index
+ hid/index
+ sound/index
+ gpu/index
+ fb/index
+ leds/index
+
+Networking interfaces
+---------------------
+
+.. toctree::
+ :maxdepth: 1
+
+ networking/index
+ netlabel/index
+ infiniband/index
+ mhi/index
+
+Storage interfaces
+------------------
+
+.. toctree::
+ :maxdepth: 1
+
+ filesystems/index
+ block/index
+ cdrom/index
+ scsi/index
+ target/index
+ nvme/index
+
+Other subsystems
+----------------
+**Fixme**: much more organizational work is needed here.
+
+.. toctree::
+ :maxdepth: 1
+
+ accounting/index
+ cpu-freq/index
+ edac/index
+ fpga/index
+ i2c/index
+ iio/index
+ pcmcia/index
+ spi/index
+ w1/index
+ watchdog/index
+ virt/index
+ hwmon/index
+ accel/index
+ security/index
+ crypto/index
+ bpf/index
+ usb/index
+ PCI/index
+ misc-devices/index
+ peci/index
+ wmi/index
+ tee/index